The invention relates to a construction method of a medium-hole vibrating casing wall protection type long spiral cast-in-situ bored
pile. The construction method comprises the steps that surveying and setting-out are conducted for determining a
pile position, and a long spiral drilling
machine is made to be aligned to the
pile position; the long spiral drilling
machine is started, and a spiral
drill rod and a
drill bit are driven to conduct rotary drilling vertically downwards; a medium-hole vibrating hammer is started at the same time to drive a pile casing to follow up vertically downwards to a preset pile end depth; the spiral
drill rod idles, so that residue soil at the bottom is discharged; the drill rod is lifted, concrete is poured into a pile hole while the spiral drill rod is lifted, and concrete pouring is stopped after the spiral drill rod is lifted to a preset height; after concrete pouring is completed, the pile casing is left in the pile, the long spiral drilling
machine is removed out of the pile hole, and a
steel bar insertion device and a steel reinforcement cage are inserted into the poured concrete together by means of a crane while being vibrated; and after the steel reinforcement cage is inserted to a preset depth, the steel rib
insertion device is pulled out, the pile casing is completely pulled out, and the cast-in-situ pile is solidified and formed. The construction method of the medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile has the advantages that the quality of the cast-in-site pile is high, construction is safe, the cost is low, the speed is high, environmental friendliness is achieved, and results are practical.